Skip Navigation
National Institutes of Health: National Cancer Institute: Division of Cancer Control and Population Sciences
Grant Details

Grant Number: 5R01CA142996-03 Interpret this number
Primary Investigator: Olopade, Olufunmilayo
Organization: University Of Chicago
Project Title: Genome-Wide Association Study of Breast Cancer in the African Diaspora
Fiscal Year: 2012
Back to top


Abstract

DESCRIPTION (provided by applicant): The paucity of data on the genetic epidemiology of breast cancer for racial/ethnic groups other than those of European ancestry hinders the development of innovative interventions to reduce health disparities. Women in the African Diaspora experience a disproportionate burden of pre-menopausal breast cancer in comparison to all other races for reasons that remain unknown and understudied. This higher proportion of early-onset breast cancer might suggest a stronger genetic component in these populations. Genome-wide association studies (GWAS) have revealed several genetic loci that confer risk of breast cancer. Because all GWAS started the discovery stage in women of European ancestry and replicated mainly in women of European ancestry, we propose a novel approach for a GWAS in indigenous African women to identify alleles associated with breast cancer risk which will then be replicated in other populations. This innovative design builds on our current understanding of the etiologic heterogeneity in breast cancer and the distribution of breast cancer molecular subtypes which differ between women of African ancestry and women of European ancestry. The major objective of the proposed studies is to get to the "root" causes of breast cancer by identifying breast cancer risk alleles in a pooled sample of women of African ancestry and to replicate our findings in other populations. To achieve this objective, we propose the following specific aims: 1) Genotype 1,796 breast cancer cases and 1,988 controls of African ancestry using the Illumina Human1M BeadChip platform. These include 944 cases and 665 controls form Ibadan, Nigeria, 171 cases and 378 controls from Barbados, and 681 cases and 945 controls from Chicago, Detroit, Philadelphia and Baltimore; 2) Conduct both standard and novel genetic analyses of the data to map genes associated with breast cancer susceptibility, 3) Verify genotyping and carry out fine-mapping studies in genes or regions showing association with breast cancer risk and related clinical phenotypes and 4) Replicate in other African American and non-African American populations. By pooling unique resources from studies throughout the African Diaspora, this study has the potential to identify risk alleles in several genes that contribute to increased breast cancer risk and may have implications for early detection, prognosis and treatment of breast cancer in ALL women. This should ultimately lead to improved outcomes for those who suffer a disproportionate burden of early-onset breast cancer. PUBLIC HEALTH RELEVANCE: Of all the racial/ethnic groups in the United States, African Americans have the highest mortality rate of breast cancer diagnosed in women under 35 years of age, and in Africa, breast cancer is a uniformly fatal affliction of young women, in part, due to poor access to care and ignorance of the disease. This project focuses on the understudied global problem of breast cancer in the African Diaspora and attempts to translate recent advances in genomics research to benefit women who are at risk of developing hormone receptor negative breast cancer, an aggressive form of breast cancer that often affects younger women. Better understanding of the genetic risks of breast cancer for women in the African Diaspora should lead to better clinical risk assessment and the development of more effective strategies for prevention, early detection and treatment of breast cancer for ALL women.

Back to top


Publications

Germline Mutational Analysis Of The C19orf62 Gene In African-american Women With Breast Cancer
Authors: Zheng,Y. , Zhang,J. , Niu,Q. , Olopade,O.I. , Huo,D. .
Source: Breast Cancer Research And Treatment, 2011 Jun; 127(3), p. 871-7.
PMID: 21431873
Related Citations

Novel Germline Palb2 Truncating Mutations In African American Breast Cancer Patients
Authors: Zheng,Y. , Zhang,J. , Niu,Q. , Huo,D. , Olopade,O.I. .
Source: Cancer, 2012-03-01 00:00:00.0; 118(5), p. 1362-70.
PMID: 21932393
Related Citations

Lack Of Association Between Common Single Nucleotide Polymorphisms In The Tert-clptm1l Locus And Breast Cancer In Women Of African Ancestry
Authors: Zheng,Y. , Ogundiran,T.O. , Adebamowo,C. , Nathanson,K.L. , Domchek,S.M. , Rebbeck,T.R. , Simon,M.S. , John,E.M. , Hennis,A. , Nemesure,B. , et al. .
Source: Breast Cancer Research And Treatment, 2012 Feb; 132(1), p. 341-5.
PMID: 22134622
Related Citations

Fine Mapping Of Breast Cancer Genome-wide Association Studies Loci In Women Of African Ancestry Identifies Novel Susceptibility Markers
Authors: Zheng Y. , Ogundiran T.O. , Falusi A.G. , Nathanson K.L. , John E.M. , Hennis A.J. , Ambs S. , Domchek S.M. , Rebbeck T.R. , Simon M.S. , et al. .
Source: Carcinogenesis, 2013 Jul; 34(7), p. 1520-8.
PMID: 23475944
Related Citations

Dna Glycosylases Involved In Base Excision Repair May Be Associated With Cancer Risk In Brca1 And Brca2 Mutation Carriers
Authors: Osorio A. , Milne R.L. , Kuchenbaecker K. , Vaclová T. , Pita G. , Alonso R. , Peterlongo P. , Blanco I. , de la Hoya M. , Duran M. , et al. .
Source: Plos Genetics, 2014 Apr; 10(4), p. e1004256.
PMID: 24698998
Related Citations

A Comprehensive Examination Of Breast Cancer Risk Loci In African American Women
Authors: Feng Y. , Stram D.O. , Rhie S.K. , Millikan R.C. , Ambrosone C.B. , John E.M. , Bernstein L. , Zheng W. , Olshan A.F. , Hu J.J. , et al. .
Source: Human Molecular Genetics, 2014-10-15 00:00:00.0; 23(20), p. 5518-26.
PMID: 24852375
Related Citations

Assessing Associations Between The Aurka-hmmr-tpx2-tubg1 Functional Module And Breast Cancer Risk In Brca1/2 Mutation Carriers
Authors: Blanco I. , Kuchenbaecker K. , Cuadras D. , Wang X. , Barrowdale D. , de Garibay G.R. , Librado P. , Sánchez-Gracia A. , Rozas J. , Bonifaci N. , et al. .
Source: Plos One, 2015; 10(4), p. e0120020.
PMID: 25830658
Related Citations

Associations Of Common Breast Cancer Susceptibility Alleles With Risk Of Breast Cancer Subtypes In Brca1 And Brca2 Mutation Carriers
Authors: Kuchenbaecker K.B. , Neuhausen S.L. , Robson M. , Barrowdale D. , McGuffog L. , Mulligan A.M. , Andrulis I.L. , Spurdle A.B. , Schmidt M.K. , Schmutzler R.K. , et al. .
Source: Breast Cancer Research : Bcr, 2014; 16(6), p. 3416.
PMID: 25919761
Related Citations

No Clinical Utility Of Kras Variant Rs61764370 For Ovarian Or Breast Cancer
Authors: Ovarian Cancer Association Consortium, Breast Cancer Association Consortium, and Consortium of Modifiers of BRCA1 and BRCA2 , Hollestelle A. , van der Baan F.H. , Berchuck A. , Johnatty S.E. , Aben K.K. , Agnarsson B.A. , Aittomäki K. , Alducci E. , Andrulis I.L. , et al. .
Source: Gynecologic Oncology, 2015-05-02 00:00:00.0; , .
PMID: 25940428
Related Citations

Male Breast Cancer In Brca1 And Brca2 Mutation Carriers: Pathology Data From The Consortium Of Investigators Of Modifiers Of Brca1/2
Authors: Silvestri V. , Barrowdale D. , Mulligan A.M. , Neuhausen S.L. , Fox S. , Karlan B.Y. , Mitchell G. , James P. , Thull D.L. , Zorn K.K. , et al. .
Source: Breast Cancer Research : Bcr, 2016; 18(1), p. 15.
PMID: 26857456
Related Citations

Expression of polycomb targets predicts breast cancer prognosis.
Authors: Jene-Sanz A. , Váraljai R. , Vilkova A.V. , Khramtsova G.F. , Khramtsov A.I. , Olopade O.I. , Lopez-Bigas N. , Benevolenskaya E.V. .
Source: Molecular and cellular biology, 2013 Oct; 33(19), p. 3951-61.
EPub date: 2013-08-05.
PMID: 23918806
Related Citations

A meta-analysis identifies new loci associated with body mass index in individuals of African ancestry.
Authors: Monda K.L. , Chen G.K. , Taylor K.C. , Palmer C. , Edwards T.L. , Lange L.A. , Ng M.C. , Adeyemo A.A. , Allison M.A. , Bielak L.F. , et al. .
Source: Nature genetics, 2013 Jun; 45(6), p. 690-6.
EPub date: 2013-04-14.
PMID: 23583978
Related Citations

Microsatellites in the estrogen receptor (ESR1, ESR2) and androgen receptor (AR) genes and breast cancer risk in African American and Nigerian women.
Authors: Zheng Y. , Huo D. , Zhang J. , Yoshimatsu T.F. , Niu Q. , Olopade O.I. .
Source: PloS one, 2012; 7(7), p. e40494.
EPub date: 2012-07-11.
PMID: 22792352
Related Citations